Waliczek, Mateusz
Kijewska, Monika
Rudowska, Magdalena
Setner, Bartosz
Stefanowicz, Piotr
Szewczuk, Zbigniew
Article History
Received: 22 June 2016
Accepted: 28 October 2016
First Online: 28 November 2016
Competing interests
: The authors declare no competing financial interests.